• Nano-Micro Letters
  • Vol. 15, Issue 1, 202 (2023)
Changlong Sun1, Xin Xu1, Cenlin Gui1, Fuzhou Chen1, Yian Wang2, Shengzhou Chen1, Minhua Shao2、*, and Jiahai Wang1、**
Author Affiliations
  • 1School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, People’s Republic of China
  • 2Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon Hong Kong, People’s Republic of China
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    DOI: 10.1007/s40820-023-01175-6 Cite this Article
    Changlong Sun, Xin Xu, Cenlin Gui, Fuzhou Chen, Yian Wang, Shengzhou Chen, Minhua Shao, Jiahai Wang. High-Quality Epitaxial N Doped Graphene on SiC with Tunable Interfacial Interactions via Electron/Ion Bridges for Stable Lithium-Ion Storage[J]. Nano-Micro Letters, 2023, 15(1): 202 Copy Citation Text show less

    Abstract

    Tailoring the interfacial interaction in SiC-based anode materials is crucial to the accomplishment of higher energy capacities and longer cycle lives for lithium-ion storage. In this paper, atomic-scale tunable interfacial interaction is achieved by epitaxial growth of high-quality N doped graphene (NG) on SiC (NG@SiC). This well-designed NG@SiC heterojunction demonstrates an intrinsic electric field with intensive interfacial interaction, making it an ideal prototype to thoroughly understand the configurations of electron/ion bridges and the mechanisms of interatomic electron migration. Both density functional theory (DFT) analysis and electrochemical kinetic analysis reveal that these intriguing electron/ion bridges can control and tailor the interfacial interaction via the interfacial coupled chemical bonds, enhancing the interfacial charge transfer kinetics and preventing pulverization/aggregation. As a proof-of-concept study, this well-designed NG@SiC anode shows good reversible capacity (1197.5 mAh g-1 after 200 cycles at 0.1 A g-1) and cycling durability with 76.6% capacity retention at 447.8 mAh g-1 after 1000 cycles at 10.0 A g-1. As expected, the lithium-ion full cell (LiFePO4/C//NG@SiC) shows superior rate capability and cycling stability. This interfacial interaction tailoring strategy via epitaxial growth method provides new opportunities for traditional SiC-based anodes to achieve high-performance lithium-ion storage and beyond.
    Changlong Sun, Xin Xu, Cenlin Gui, Fuzhou Chen, Yian Wang, Shengzhou Chen, Minhua Shao, Jiahai Wang. High-Quality Epitaxial N Doped Graphene on SiC with Tunable Interfacial Interactions via Electron/Ion Bridges for Stable Lithium-Ion Storage[J]. Nano-Micro Letters, 2023, 15(1): 202
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